Okay. So I work with people that feel that they need to keep every email they send, receive and (sometimes) delete. I got this one guy whose .pst file is at 2Gb. About a year ago, he had it that large and we had a long talk about how this was a no-no, but alas, here we are again.

Anyways, I went about repairing it the same way I did last time.

Use Microsoft's .pst/.ost cropping tool to trim file size down to it's upper limits as to not lose anything more than necessary.

Use scanpst.exe (NT version) to repair the file. (Also did this before crop tool, just in case we could get lucky. We weren't lucky.)